As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD 1 OFF ALERT ILLUMINATED IN FLIGHT. QTY REMAINED ABOVE 7.1 FOR DURATION OF FLIGHT. PSI WAS 0, NO FAULTS FOUND ON ARRIVAL. TROUBLE SHOT IAW FIM 29-10-00-2. R & R HYD SYS CONTROLLER PN REMOVED 4059021-903 & SN 97080460 IAW AMM 29-08-01-2. RTS SATISFACTORY, ENG RUN PERFORMED WITH NO DEFECTS NOTED. ACFT OK TO CONTINUE.